I have a 97 LGT with the EJ25D that just experienced head gasket failure. I intend to just replace the engine. I know I should just do head gaskets but I work for a salvage yard and can get a deal on a "new" engine. Plus I can swap engines in about 4 hrs and it would take at least that long to just break down my engine. I want to swap in an EJ251 from a 01 OB. What needs to be modified to make this engine work? Exhaust manifold? ECM? Anything transmission related?